Failed to open /dev/oprofile//pointer_size

I am using a machine with a Intel Xeon processors with em64t, Redhat Linux
AS3.
oprofile-0.8.1
#opcontrol --start
...
op_read_int_from_file: Failed to open /dev/oprofile//pointer_size, reason
file or directory not found
...
In fact, there is not any file named of 'pointer_size' in directory
/dev/oprofile/.
Thanks!
--
IanJiang

Thread view

I am using a machine with a Intel Xeon processors with em64t, Redhat Linux
AS3.
oprofile-0.8.1
#opcontrol --start
...
op_read_int_from_file: Failed to open /dev/oprofile//pointer_size, reason
file or directory not found
...
In fact, there is not any file named of 'pointer_size' in directory
/dev/oprofile/.
Thanks!
--
IanJiang

IanJiang wrote:
> I am using a machine with a Intel Xeon processors with em64t, Redhat Linux
> AS3.
> oprofile-0.8.1
>
> #opcontrol --start
> ...
> op_read_int_from_file: Failed to open /dev/oprofile//pointer_size, reason
> file or directory not found
> ...
>
> In fact, there is not any file named of 'pointer_size' in directory
> /dev/oprofile/.
>
> Thanks!
OProfile 0.8.1 is not the version that came with Red Hat AS3. Mixing
versions of kernels and oprofile is not supported.
There have been some changes in the ABI between kernel versions, e.g.
new kernel have /dev/oprofile/pointer_size. Hence your problem.
There is a FAQ available http://people.redhat.com/wcohen/OProfileFAQ.txt.
-Will

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